Electrical sparking device



Sept. 18, 1923, 11 46851 7 W. C. SCHNEIDER ELECTRI CAL SPARKING DEVICE Filed Jan. 7, 1922 ZV ,(s f/k/ll l dpli INVENTOR.

A T TORNE Y.

e jzilnd Stateof Wiseonsinyhave invented cerplug having a reduced and 'exteriorly 1Q nients-in electrical sparking devices gen- This reduced extension 6 is provided with a 15 The principal object of the invention is shell'5 is a'body or core 90f an insulating p i completely destroys the efieetiveness ofthe end of the taperedportion 10 snuglyfitting 1 which is operable under the impulses of sucfrom the cylinder oftheengine, with which of sta'ndard types without'any' serious modi- 11, ofthe insulating hody orcore 9, opposed 95 a 45 view, the invention resides in the certain sunk at its lower end toprovide an inwardly 100 Patented Sept; 18, 1923. r i 1 a r l l r VVY If i ;jwnmnn c; scnnnlnnnyor nneias, isconsin. I i

i I ni'inc' 'rnienti sPnnKiNe'nnvIcn iA ppl i caltion filed January 7,1922} Seria1 Nof 527fi42. I

T otili 'juglioi/titwing/concern." Figure 3 is: an elevation. of the same, Betl'fl known thatl wnnrnn C.- SC'H'NEP partly 1n seetlon; a a

nun, :a jc f pn O fjthellnited States, 1"es1d "Referrlngto the drawing, the numeral 6 llig Adams in the county of Adamslndicatesthe inetal body or shell of a spark jta in" anduse fiil ln provernentsinElec threaded lower extension 6 adapted-for en trical Sp'ark1I1g Dam s, of whrchthetolgag'e'i'nent in a coinpleinentally threaded *1 lowingisa specification. spark plug opening of the cylinder otan The lnvent n relates tocertainimpro'veinternal combustion engine (not shown).

""er ally, and'inore particularly to a spark concei'itrically disposed bore 7 which opens plug type thereof adapted for use in ignitinto a bore 8 of a larger diameter and simiing. fuel 'chargjes'in the cylinders of internal larlyjforn ed in theupper portion of the combustion engines and the like; 3 'body or'shell 5. Seated within the body or to provide-foranieans cooperative'with" the material, which lSfOIYHGCl to provide a opposed end portions or s'zurtac'es otthe lower tapered end portion 10 depending electrodes forming a spark gap, 'wliereby-to jdownwardly through the bore 7 andhaving eliminate any and all 'tendency'to the carits lower'end projecting for a slight dis- 0 bonizingof theactive'po'rtions of the'said tance belowthelower end oit'the reduced electrodes; throughout continued use thereend portion 6 of the plug or shell 5, and an 1 at, such as. otherwise greatly lessens 'or annular shouldered portion 11 at the upper said sparkgap. V the larger bore 8 in the upper end portion 25 Anothe object of the invention is" to "proof the plug orshell -This insulating body vide'for asparkingfdevice oftheclass men "ol c ore 9 is rigidly secured in position, by

tioned, andfone involving the use ofaanetal means of a clamp nut 12, which is passed elenientbetween theoppo'sed ends on active downwardly over the upper end of the same surfacesof the electrodes} forming the spark and is threaded into. the upper end of the gap of the device, whereby thesaine'forms bore 8 ofthe plug or shell 5 for the pur- 'a part of the electrical, circuit thereof; and pose. To prevent any loss of compression 7 I cessive explosions "of fuel. charges Within the spark plug-is beingused, and upwardly the cy'linchars of an engine "for; preventing of the bores 7 and 8 of the plug or shell 5, 35 the accumulations of carbon ,oil'on the packing gaskets o1- washers 13' and l t are actixfe ends or surfaces ofsaid'ele ctrodes; interposed between the lower end wallet V Afurther object of the invention'fis to "the-bore 8 and-the inner endo'f the clamp provide for a'means as characterized;and or jam nut 12 and the lower and upper one capable of being applied to spark plugs shoulders of the enlarged annular portion ,fication or change in the general features thereto, substantially as shown.

of construction and arrangement offthe The insulated body or core 9 is formed ypartsthereo'f; 'with aconc'entrically disposed andlongitui With the foregoing and other, objects in dinally extending bore 15, which lSi counter new and useful construction andarrange tapered portion 16, and'has inserted up "nientaswillbehereinafter more fully de- "wa-rdly therethrough a center electrode 17. scribed, set forth in the appended claims, Inwardly of the lower end of the electrode I and. illustrated in'the accompanying draw- '17 ii the same is provided with. an annular 50 ing, in which:' portion orcoll'ar 18, which abuts the sheul- V Figure 1 isa vertical section taken enthe dered wallportion at the inner end of the :line 11 of Figurefi, and shows apreferred "tapered bore 16 and determines the length "en ibodiinent ofthe irnprovedspaikplug, "of the "lower end portion of :the electrode Figure? is' a bottoin plan view thereof; depending froin the bore 1 5 and within the and, I confines of'the'l'atter. With the portion or 119 EXtending diametrically across the lower 'endo'f the bodyor'shcll 5, "and spaced there- 7 I V Ovfroiii isa baror strap iormcfelectrode 22,

collarl8so arranged, the upper end of-the electrode 17 projects for adistance above the upper end of the insulating body or coreg9 and has positioned thereon, in the 1 order named,"a nietal washer 19,11 securing nut'20, and 'anlgnition ClI'CLlliilQiitCl blndlng nut 21; J

which has its oppositee'ndsf angularly bent I ier-connection with theawall of theflower xreduce'd portion .6, whereby the-same is elec- --,ele ctrodem22 also extends diametrically.-

,"trically groundedQthrough the body or shell-V 5to theeng-ine; The medial portion of'the across thei'l'owe'r end of therinsulated body :orucorei), and consequently and correspond- 1 ingly so across the tapered bore 1L6v therein 20,

and has its inner face opposed by the lower jend of the center electrode 17, which is spaced for a distance inwardly, of the said" bore l6.' Loosely mountedwithin the open end of the tapered bore 16, of theiinsulated the-center electrode 17 and the inner: face body or core 9' andbetw'een the lower-end of 3 of-the electrode 22, is ametal nieinber'23,

fpreferably in the form of a spherical body .or' ball, which, when? resting on the latter,

'provides'for a sparkgap between-its upper 'surface anduthe opposed end: of thejcentral electrode 17 and of the usual length, or of" about" three sixty-fourths of'an inch. To

{end of the center electrodel'? and the upper surface of the spherical body or ball 23, the

assure of the positive ignition of a fuel charge by a'spark passing between the lower 1 wall of the lower end of the insulated body 7: V in line with the spark or core9 is provided with a series of 'equie distantly spaced recesses 24, which are outwardly flared as at 25, and these recesses 24- 1 open directly into the tapered bore thereof trodes forsu'ch purpose.

'In the useoi spark plugs constructed and 1 arranged in accordance with the invention,

i-rand when the same are positioned 'in the -walls of the cylinder or cylinders of an in- .ternalcombustion enginein the ordinary manner of mounting thereof and properly,

connected in on-the ignition circuit, the spherical body or ball 23 will rest on the 7 upper or inner face of the grounded elec-' 7 trode 22, so that a spark gap is provided as hereinbeforexexplained Upon the c01npletion of the ignition circuit, through the center electrode 17, a spark will be created pat the lower end ofthe latter and Wlll jump the gap tothe upper surface of the body or ball 23', and ignite the fuel charge through the recesses 24: and the open end of thetapered'bore 16. During successiveexiplostone of fuel charges within thecylinder or 'linders of the engirie', the movable bore or 5 f iterical member 23,] oonstitutlng within gap between the elecy y with, andextending across the inner end of 17,,also, by reason of the force of such jos tling ori n'pact, under the force of the succes surfaces of all of the metal parts forming 15 3 f sive explosions ofzthe fuel charges,- iillQZQC tl VB" the spark gap will be kept free from aceun ul ations or depositsof carbon and oil-,- such as otherwise greatly 'lessens or completely destroys the-effectiveness ot the sparkplug. 7 In practice,it has been found thattheaction otthemovable electrode 23,;vand' the force 7 of the impact imparted. to the same, is 'sufii-q .cient to effectually preventthe depositing" of carbon and oil on the electrodes, and" to such an extent as to greatly increase the length 0&5

life ofthe spark plug, and to maintain l the same. at a high standard of eiiiciency, such" asis not obtainable inthe use of present and known constructions of sparkfplugs.

Fro nthe foregoing,it will bereadilyapparent that, while a preferred embodiment 5 of the spark plug has been described andl illustrated herein in specific terins aiidfdetails of construction and arrangement, var ous changesin and IDOCllfiCflJiZlOl'lSOIEiZhQ same may be resorted to without departing vfrom claims appended hereto j the spirit of theinvention, orthe scope 'of the whatisclaimed,is:--

1, A spark plug folinternal combustion eng nes comprising a metallic shell, a core of insulation mounted therein, an electrode ,disa posed concentrically of saidcore and,having.. its inner endpositioned above the inner end of .therlatter, an electrode formed integral.

the shelland further spaced belowthe inner end of the core, and a freely movable globuf lar metallic element extended within the inr nerend of the core, and interposed between the opposed portions-of said electrodes and operable under theforce of; the explosions inan engine cylinder to prevent accumulation of carbon and oil on the oppositely 'actingsparking surfaceso f said electrode,

and said corehaving its inner end provided with a plurality of equidistantly spaced' outwardly flared recesses openingthrough the core in line with the spark gap between the electrodes. H 7 1 1 f2. Ina spark plug for internal-combustion engines,;a metallic shell, a core oiin'sulation extendingltherethrough, an electrode disposedconcentricallyr of said core and-having ,7

its inner ;end positioned-inwardlywith respect to the inner end of the core, a; trans: 5

yersely extending U h d r de having #3071,

V 100 Having thus fully described the invention, r

'ally opposite points and extending" across provided With a'plurality of 'equidistantly 10 1,468,517 1 i p i V m its end integral with said shell at diametricand said core having the inner end thereof and positioned in close proximity to the spaced outwardly flared recesses opening inner end of said core, and afreely movable. through the core in-line with the spark gap globular metallic element supported by said between said electrodes U-shaped electrode and extended in the inner In testimony whereof, I affix my signature end of the core and further'interposed behereto. tweenthe opposed portions of said electrode, WALTER SCHNEIDER. 

